Senior Software Engineer: Cloud API & Microservices for Fintech

CSI Companies; Los Angeles (CA); Hybrid; USD 150,000 - 210,000; Full time

Benefits offered by this job

Medical, dental and vision coverage

Voluntary life and AD&D coverage

Advancement opportunities

Job summary

CSI Companies seeks a Senior Software Engineer to design, develop, and support scalable, secure cloud-native applications for embedded financial services. You will build APIs and microservices for BaaS onboarding and partner integrations, while collaborating with product managers, architects, and engineering teams to ensure robust, reliable solutions.

You will mentor colleagues, participate in CI/CD, automated testing, and observability initiatives, and help maintain security standards and

Qualifications

• 5+ years of software engineering experience.
• At least 1 year of technical leadership experience.
• Strong portfolio demonstrating secure and standards compliant software development.
• Strong experience with C#, .NET, and SQL.
• Hands on experience with Azure services including APIM, Azure SQL, Cosmos DB, and Key Vault.
• Experience with container technologies.
• Experience with caching frameworks.
• Strong understanding of RESTful API design.
• Experience implementing OAuth2 and OpenAPI standards.
• Experience with event driven architectures including Service Bus and Event Hubs.
• Experience with microservices architecture patterns.
• Experience with Datadog, Grafana, or similar observability platforms.
• Experience working in fast paced environments supporting customer facing applications.
• Strong knowledge of Git, DevOps, Agile Scrum, and software development best practices.
• Understanding of PCI DSS, SOC 2, and financial services security requirements.

Responsibilities

• Design and develop APIs and microservices that support BaaS onboarding and partner integrations.
• Collaborate with product managers, architects, and engineering teams to define technical requirements and deliver scalable solutions.
• Support engineering excellence through code reviews, mentoring, and development best practices.
• Contribute to CI/CD, automated testing, and observability initiatives.
• Ensure compliance with SLA standards and operational requirements.
• Support monitoring, alerting, and system reliability efforts.
• Participate in incident response and root cause analysis activities.
• Create architectural documentation and technical design materials.
• Evaluate emerging technologies and recommend solutions that support business objectives.
• Refactor and extend existing applications to resolve defects and enhance functionality.
• Design systems that are durable, scalable, and highly configurable.

Skills

C#

.NET

SQL

Azure

RESTful APIs

OAuth2/OpenAPI

Microservices

DevOps

Git

PCI DSS/SOC 2

Tools

Azure APIM

Azure SQL

Cosmos DB

Key Vault

Job description

CSI Companies seeks a Senior Software Engineer to design, develop, and support scalable, secure cloud-native applications for embedded financial services. You will build APIs and microservices for BaaS onboarding and partner integrations, while collaborating with product managers, architects, and engineering teams to ensure robust, reliable solutions.

You will mentor colleagues, participate in CI/CD, automated testing, and observability initiatives, and help maintain security standards and